Syringe or sprayer



w. GRIMLEY SYRINGE 0Rl SPRAYERl Filed Dec. 29. 1924 Dec. 20, 1927.\

WILLIAM GRIMLEY, OF

PATENT OFFICE.

SMETHWICK, ENGLAND.

SYRINGE on srnAYnR.`

Application led December 29, 1924, Serial No.

This invention relatesto a new or improved construction of syringes and sprayers such as are used in gardening' and horticulture. The -invention is also applicable to syringes and sprayers which'are to beused4 for other purposes.

The primary object of this invention is t0 provide an improved combination and arrangement of valves and parts in general which will not konly ensure a positiv-e and reliable action, but will enable the several parts to be constructed easily and cheaply, and also in a manner allowing of the renewal of those parts liable to become worn i5 after prolonged use. Further objects of this invention are to construct the apparatus so that it can be used with the greatest cony venienoe and comfort and also sok that it is not liable to become stopped up or choked when used with liquids liable to contain solid matter.

Further advantages of this invention will be apparent fromthe followingdescription of the accompanying drawing illustrating a particular embodiment of Y'my invention in section. L n

In the construction illustrated by the accompanying drawing, the apparatus comprises a ycylinder 1 having a piston 2 and a .a0 piston rod 4 passing out through astuffing box 5 in the cylinder cover 6.

At its forward end the cylinder 1 is provided with a cap having a through discharge passage in which is fitted a non-return ball valve 7. This passage is continued for a substantial length by means of a tube'y 8 vin order to enable "the user to have a wider range of action.

The tube8 is provided at its forward end with a nozzle member 9 which may be of any suitable construction and may be in the form of a central jet or it may be inthe form of a rose or spray. The nozzle is preferably detachably connected to the tube 8Wso that it may bequickly'removed and a nozzle of dierent form substituted, as required.

The non-return ball valve 7 is prevented from passing into the tube 8 by an abutment member which in the construction shown is in the form( of av U shaped piece of wire 10 which is soldered or otherwise secured in position across the mouth of the tube adjacent the ball.

The piston rod 1i is provided with an extension or enlarged shank-like portion 11 at its forward end which is formed separately' 758,741, and in Great Britain January 4, 1924.

from the' piston rod and is screwed into engagement therewith. Formed integral with the memberll is a disc-like head 12 which is of less diameter than the internal diameter of the-cylinder'l, to allow the liquid to flow past its outer edge. Upon the front face of the head portion 12 is a washer or valvemember 18 of rubber or any other' suitable material which is retained in position by the :flanged over edges 14 of the part 12. Screwing into the end of the member 11 is a short rod 15 upon which is slidably mounted the piston proper 2. The piston 2 comprises a disc-like member having a forwardly eX- -tending screw-threaded shank portion 16, a

disc 17 y of slightly less diameter mounted upon the screwthreaded shank and a cup washer 18 mounted in position between the two discs 2 and 17. Passing through the piston 2, through the disc 17 and also through the cup washer 18 are a number of holes 19. Thel forward end of the screwthreaded shank 16 is provided with a vpair of oppositely disposed slots 2O through which the ends of a pin 21 pass, the pin being secured within a hole in the rod 15. By the pin 21 engaging in the slots 20. the piston is allowed a limited amount of sliding movement, so that when thev piston rod is pushed in one direction the valve member 13 positively closes the holes 19 by engagement with their ends on the face of the piston.

At the rear of the cylinderl 1 a liquid inlet pipe 22 is provided. The end of this pipe 22 is screw threaded and screwing upon kthe exterior of this pipe isa two-armed union nut 23 which serves to detachably'retain a short tube 24. This tube 24'carries a length of flexible rubber hose or the like 25. This rubber hose 25 may be of any suitable length. The opposite end of the hose ris connected to a nipple 26 upon a casing 27 surrounding a non-return ball valve 28 mounted in position upon a seating 29. The casing is provided at its lower end with a cylindrical cap 30 having lateral perforations and a cylindrical wire gauge or the like filter 31. Arranged radially-around they cage member 27 are a number of legs 32 (three being a suitable number) which serveto space the lower part of the cage away from the bottom of the liquid container or pail and above any sediment which may have collected therein, and also serve to retain the ball valve in a position in which it can fall gravity n to its seat. Arranged above ball valve but mounted upon a float so that the inlet endv of the hose receives the liquid Jfrom near its surface.

lf a float is not used, `the casing is provided lwith the downwardly project ing' feet so that the inlet to vthe valve casing or to the Vhose will never sinkinto sediment. Claimsl1. A syringe or sprayer comprising in combination a cylinder, a fluid inlet to the cylinder located near one end of the cylin der, a casing connected to said inlet by a flexible pipe and adaptedto be placed in vany Suitable reservoir, ya non-return valve Within said casing, a cylindrical cap having lateral perforations attached to the 10W-er 'end of said casing, said pertorations being covered by a filter, legs on said casing adapted to space the loiver part of said .perforated cap away from the bottom of the 'reservoir in which it is placed, a valve controlled fluid outlet at the other end of vsaid cylinder, a solid piston rod, an extension attach-ed to the inner end of said pislton rod and having an integral disc-like recessed head, a flexible Washer mounted in said recess, a bearing pin secured centrally in said head and projecting therefrom, a piston of larger diameter than said head, slidably mounted on said pin, said piston comprising a disc having` a central externally screw threaded hollow shank adapted to'slide on said'pin, a flexible cup Washer mounted on said shank and clamped in its Workingy position between la plate screwed on to said shank and said disc, the said disc, cup Washer and plate having registering holes therein for'tlie passage of fluid, and a transverse pin in the end of the vsaid bearing pin adapted to Work in a slot`in the shank of' said disc.

2, A syringe or sprayer ,comprising 'in combination a cylinder, a valve `.controlled fluid inlet at one end of said cylinder, an outlet at the other end of the cylinder, a cap on the deliveryend of tliecylinde'r having a through passage and a non-*return valve, a tubular extension of substantial length carried by said cap, a removable noz- Zle on said tubular extension, a solid piston rod, an extension attached tothe inner end of said piston rodand having` an integral disc-like recessed head, a flexible washer mounted `in said recess, a bearing` pin secured centrally in said head and projecting Y therefrom, a piston of larger diameter than said head, slidablyinoiinted on said pin, said lpiston comprising a disc vhaving a central externally screw Ythreaded hollenv shank adapted vto slide on said pin, a flerible cup Washer mounted on said shank and clamped in its Working position vbetween a plate screwed on to .said shank and said discI` the saiddisc, cup Washer and plate having registering holes therein Vfor the passage of fluid, and a transverse -pin in the Iend of the Vsaid bearing` pin adapted to Work iii a "slot rated cap aivay"`froin the bottom of the reservoir in which it is placed, an outlet at i the other "endof the cylinder, a cap on the delivery end of the cyli-nder having a through passage vand a non-return valve.l a

tubular extension of substantial length carried by said cap, a removablenozzle on said tubular extension, .a solid pistonv rod, an exitension attached to the Yinner end of said piston rod and having an integral disc-like Irecessed head,a`ii'exible Washer mount-ed said recess, .a bearingpin secured centrally in said head and projecting therjefromfa piston of larger diameter' than said head, slidably mountedy on said pin, saidpiston comprising a disc having acentral eXternally screw threaded hollovv shank adapted to slide on said pin, a flexible cu-p Washer mounted on said shank and clamped in its Working position betvveenV a plate screwed l on to said shank and said disc, the said dise,l

cup Washerrand .plate havingregistering holes therein for the passage ofthe fluid,

4and a transverse pin lin the end of thejsaid bearing pin .adapted to vvork in a slot in the shank of said disc. c Y Y In Witness Whereofl affix my signature.

WILLIAM GRIMLEY; 

